There is one trick to working with screws in fiberglass that many folks don't know about: drill and tap the oversize/epoxy filled holes for MACHINE SCREWS! 1/4-20 ss screws have worked very well on my galley and pedestal seats. You can even use blue locktite to keep 'em tight. DON'T use wood/sheet metal or self tapping screws . . . vibration and relative motion between parts cause the sharp threads on cut into the glass!
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